Oven appliance and methods for high-heat cooking

ABSTRACT

A method may include directing a top heating element according to a first cooking cycle that includes a high heat output of the top heating element. The method may also include detecting an oven temperature greater than or equal to the predetermined cooking threshold within the cooking chamber and directing, in response to detecting the oven temperature greater than or equal to the predetermined cooking threshold, the top heating element according to a second cooking cycle for a set time period. The second cooking cycle may include a periodic heat output and a second-cycle predetermined cooking temperature within the cooking chamber. The method may further include determining expiration of the set time period and adjusting heat within the cooking chamber in response to determining expiration of the set time period.

FIELD OF THE INVENTION

The present subject matter relates generally to oven appliances, andmore particularly, to methods of operating an oven appliance forlocalized, high-heat cooking.

BACKGROUND OF THE INVENTION

Conventional residential and commercial oven appliances generallyinclude a cabinet that includes a cooking chamber for receipt of fooditems for cooking. Multiple gas or electric heating elements arepositioned within the cabinet for heating the cooking chamber to cookfood items located therein. The heating elements can include, forexample, a bake heating assembly positioned at a bottom of the cookingchamber and a separate broiler heating assembly positioned at a top ofthe cooking chamber.

Typically, food or utensils for cooking are placed on wire racks withinthe cooking chamber and above the bake heating assembly. A temperaturesensor within the cooking chamber may be used to maintain the cookingchamber at a select temperature. In some instances, protective orradiant plates are positioned over the bake heating assembly to protectthe bake heating assembly or assist in evenly distributing heat acrossthe bottom of the cooking chamber. Nonetheless, certain food items, suchas pizzas or breads, may benefit from very high, localized (i.e.,non-diffuse) heat, or a cooking utensil with a relatively high thermalmass may be used. This may be case when using a stone or specializedhigh-heat pan (e.g., to trap heat against the bottom of flat-breads orpizza) or a cast iron skillet. In some instances, such as when bakingcertain breads, high heat is desirable for certain portions of a cookingphase (e.g., to help the bread rise), but may risk damaging or overcooking food if sustained throughout the entire cooking phase.

Difficulties may arise in executing localized, high-heat operations, orwith using cooking utensils that are heavy or otherwise have a highthermal mass. In particular, it may be difficult to consistently orappropriately heat the cooking chamber or cooking utensils therein. Thewide variation for temperatures within an oven appliance (e.g., betweenthe top and the bottom of the cooking chamber) may make it especiallydifficult to achieve consistent or desired temperatures, not simplywithin the cooking chamber generally, but also on the cooking surfacesupporting a food item thereon.

Certain problems may be exacerbated by cooking multiple items inrelatively quick succession. For instance, if a user attempts to cookmultiple items, one right after the other, trapped heat may cause thelater-cooked items to reach certain internal temperatures faster or at adifferent rate than the earlier-cooked items. This can result ininconsistent or unsuitable (e.g., burned) food items. As a result,typical cooking appliances require all heating elements to completelydeactivate while the cooking chamber is allowed to cool significantly(e.g., to within 100° Fahrenheit of the ambient temperature).

Accordingly, it would be advantageous to provide an oven appliance ormethods for safely generating high heat on a specific cooking surfacewithin the oven appliance without unduly trapping heat or maintaininghigh-heat operation beyond what is appropriate for a particular fooditem. Additionally or alternatively, it would be advantageous to providean oven appliance or methods for consistently cooking separate items ata high heat and in quick succession (e.g., without requiring the oven tocompletely deactivate or return to a temperature near the ambienttemperature).

BRIEF DESCRIPTION OF THE INVENTION

Aspects and advantages of the invention will be set forth in part in thefollowing description, or may be obvious from the description, or may belearned through practice of the invention.

In one exemplary aspect of the present disclosure, a method of operatingan oven appliance is provided. The method may include directing a topheating element according to a preheat cycle comprising a predeterminedpreheat heat output of the top heating element and determiningexpiration of the preheat cycle. The method may further includedirecting, in response determining expiration of the preheat cycle, thetop heating element according to a standby cycle that includes apredetermined standby temperature within a cooking chamber. The methodmay still further include determining expiration of the standby cycleand directing, in response to determining expiration of the standbycycle, the top heating element to a predetermined cooking thresholdwithin the cooking chamber according to a first cooking cycle thatincludes a heat output of the top heating element.

In another exemplary aspect of the present disclosure, a method ofoperating an oven appliance is provided. The method may includedirecting a top heating element to a predetermined cooking thresholdwithin a cooking chamber according to a first cooking cycle. The firstcooking cycle may include a high heat output of the top heating element.The method may further include detecting an oven temperature greaterthan or equal to the predetermined cooking threshold, The method maystill further include directing, in response to detecting the oventemperature greater than or equal to the predetermined cookingthreshold, the top heating element according to a second cooking cycle.The second cooking cycle may include a periodic heat output and apredetermined cooking temperature within the cooking chamber. The methodmay yet further include directing, following the second cooking cycle,the top heating element to an inhibited state according to a rechargecycle; detecting an oven temperature less than a minimum rechargethreshold while the top heating element is in the inhibited stateaccording to the recharge cycle; directing a bottom heating elementaccording to the recharge cycle. The recharge cycle may include a highheat output of the bottom heating element in response to detecting theoven temperature less than the minimum recharge threshold. The methodmay also include directing the bottom heating element to an inhibitedstate according to a standby cycle following the recharge cycle.

In yet another exemplary aspect of the present disclosure, a method ofoperating an oven appliance is provided. The method may includedirecting a top heating element according to a first cooking cycle thatincludes a high heat output of the top heating element. The method mayalso include detecting an oven temperature greater than or equal to thepredetermined cooking threshold within the cooking chamber anddirecting, in response to detecting the oven temperature greater than orequal to the predetermined cooking threshold, the top heating elementaccording to a second cooking cycle for a set time period. The secondcooking cycle may include a periodic heat output and a second-cyclepredetermined cooking temperature within the cooking chamber. The methodmay further include determining expiration of the set time period andadjusting heat within the cooking chamber in response to determiningexpiration of the set time period.

These and other features, aspects and advantages of the presentinvention will become better understood with reference to the followingdescription and appended claims. The accompanying drawings, which areincorporated in and constitute a part of this specification, illustrateembodiments of the invention and, together with the description, serveto explain the principles of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS

A full and enabling disclosure of the present invention, including thebest mode thereof, directed to one of ordinary skill in the art, is setforth in the specification, which makes reference to the appendedfigures.

FIG. 1 provides an elevation view of an oven appliance according toexemplary embodiments of the present disclosure.

FIG. 2 provides a perspective view of an upper cooking chamber of theexemplary oven appliance of FIG. 1 .

FIG. 3 provides another perspective view of the upper cooking chamber ofthe exemplary oven appliance of FIG. 1 , wherein a cooking plate hasbeen omitted for clarity.

FIG. 4 provides an elevation view of the exemplary upper cooking chamberof FIG. 3 .

FIG. 5 provides a schematic elevation view of the upper cooking chamberof the exemplary oven appliance of FIG. 1 .

FIG. 6A is a graph view illustrating a temperature over time for twodiscrete temperature sensors within an oven appliance during a cookingoperation according to exemplary embodiments of the present disclosure.

FIG. 7A is a graph view illustrating power output over time for twodiscrete heaters within an oven appliance during the exemplary cookingoperation of FIG. 6A.

FIG. 6B is a graph view illustrating a temperature over time for twodiscrete temperature sensors within an oven appliance during a cookingoperation according to exemplary embodiments of the present disclosure.

FIG. 7B is a graph view illustrating power output over time for twodiscrete heaters within an oven appliance during the exemplary cookingoperation of FIG. 6B.

FIG. 8 is a flow chart illustrating of method of operating an ovenappliance according to exemplary embodiments of the present disclosure.

FIG. 9 is a flow chart illustrating of method of operating an ovenappliance according to exemplary embodiments of the present disclosure.

FIG. 10 is a flow chart illustrating of method of operating an ovenappliance according to exemplary embodiments of the present disclosure.

DETAILED DESCRIPTION

Reference now will be made in detail to embodiments of the invention,one or more examples of which are illustrated in the drawings. Eachexample is provided by way of explanation of the invention, notlimitation of the invention. In fact, it will be apparent to thoseskilled in the art that various modifications and variations can be madein the present invention without departing from the scope of theinvention. For instance, features illustrated or described as part ofone embodiment can be used with another embodiment to yield a stillfurther embodiment. Thus, it is intended that the present inventioncovers such modifications and variations as come within the scope of theappended claims and their equivalents.

As used herein, the term “or” is generally intended to be inclusive(i.e., “A or B” is intended to mean “A or B or both”). The terms“first,” “second,” and “third” may be used interchangeably todistinguish one component from another and are not intended to signifylocation or importance of the individual components. The terms“upstream” and “downstream” refer to the relative flow direction withrespect to fluid flow in a fluid pathway. For example, “upstream” refersto the flow direction from which the fluid flows, and “downstream”refers to the flow direction to which the fluid flows. The terms“coupled,” “fixed,” “attached to,” and the like refer to both directcoupling, fixing, or attaching, as well as indirect coupling, fixing, orattaching through one or more intermediate components or features,unless otherwise specified herein.

Approximating language, as used herein throughout the specification andclaims, may be applied to modify any quantitative representation thatcould permissibly vary without resulting in a change in the basicfunction to which it is related. Accordingly, a value modified by a termor terms, such as “generally,” “about,” “approximately,” and“substantially,” are not to be limited to the precise value specified.In at least some instances, the approximating language may correspond tothe precision of an instrument for measuring the value, or the precisionof the methods or machines for constructing or manufacturing thecomponents or systems. For example, the approximating language may referto being within a 10 percent margin (i.e., including values within tenpercent greater or less than the stated value).

Referring now to the drawings, FIG. 1 illustrates an exemplaryembodiment of a double oven appliance 100 according to the presentdisclosure.

Although aspects of the present subject matter are described herein inthe context of a double oven appliance 100, it should be appreciatedthat oven appliance 100 is provided by way of example only. Other ovenor range appliances having different configurations, differentappearances, or different features may also be utilized with the presentsubject matter as well (e.g., single ovens, electric cooktop ovens,induction cooktops ovens, etc.).

Generally, oven appliance 100 has a cabinet 101 that defines a verticaldirection V, a longitudinal direction L and a transverse direction T.The vertical, longitudinal and transverse directions are mutuallyperpendicular and form an orthogonal direction system. In this regard,as used herein, the terms “cabinet,” “housing,” and the like aregenerally intended to refer to an outer frame or support structure forappliance 100, e.g., including any suitable number, type, andconfiguration of support structures formed from any suitable materials,such as a system of elongated support members, a plurality ofinterconnected panels, or some combination thereof. It should beappreciated that cabinet 101 does not necessarily require an enclosureand may simply include open structure supporting various elements ofappliance 100. By contrast, cabinet 101 may enclose some or all portionsof an interior of cabinet 101. It should be appreciated that cabinet 101may have any suitable size, shape, and configuration while remainingwithin the scope of the present subject matter.

Double oven appliance 100 includes an upper oven 120 and a lower oven140 positioned below upper oven 120 along the vertical direction V.Upper and lower ovens 120 and 140 include oven or cooking chambers 122and 142, respectively, configured for the receipt of one or more fooditems to be cooked. Specifically, cabinet 101 defines a respectiveopening for each cooking chamber 122 and 142. For instance, an upperopening 123 may be defined (e.g., along the transverse direction T) toaccess upper cooking chamber 122.

Double oven appliance 100 includes an upper door 124 and a lower door144 in order to permit selective access to cooking chambers 122 and 142,respectively (e.g., via the corresponding opening). Handles 102 aremounted to upper and lower doors 124 and 144 to assist a user withopening and closing doors 124 and 144 in order to access cookingchambers 122 and 142. As an example, a user can pull on handle 102mounted to upper door 124 to open or close upper door 124 and accesscooking chamber 122. Glass window panes 104 provide for viewing thecontents of cooking chambers 122 and 142 when doors 124, 144 are closedand also assist with insulating cooking chambers 122 and 142.Optionally, a seal or gasket (e.g., gasket 114) extends between eachdoor 124, 144 and cabinet 101 (e.g., when the corresponding door 124 or144 is in the closed position). Such gasket may assist with maintainingheat and cooking fumes within the corresponding cooking chamber 122 or142 when the door 124 or 144 is in the closed position. Moreover,heating elements, such as electric resistance heating elements, gasburners, microwave elements, etc., are positioned within upper and loweroven 120 and 140.

A control panel 106 of double oven appliance 100 provides selections foruser manipulation of the operation of double oven appliance 100. Forexample, a user can touch control panel 106 to trigger one of userinputs 108. In response to user manipulation of user inputs 108, variouscomponents of the double oven appliance 100 can be operated. Controlpanel 106 may also include a display 112, such as a digital display,operable to display various parameters (e.g., temperature, time, currentphase or cycle, etc.) of the double oven appliance 100.

Generally, oven appliance 100 may include a controller 110 in operativecommunication (e.g., operably coupled via a wired or wireless channel)with control panel 106. Control panel 106 of oven appliance 100 may bein communication with controller 110 via, for example, one or moresignal lines or shared communication busses, and signals generated incontroller 110 operate oven appliance 100 in response to user input viauser input devices 108. Input/Output (“I/O”) signals may be routedbetween controller 110 and various operational components of ovenappliance 100 such that operation of oven appliance 100 can be regulatedby controller 110. In addition, controller 110 may also be incommunication with one or more sensors, such as a first temperaturesensor (TS1) 176-1 (e.g., bottom temperature sensor) or a secondtemperature sensor (TS2) 176-2 (e.g., oven temperature sensor) (FIG. 5). Generally, either or both TS1 176-1 and TS2 176-2 may include or beprovided as a thermistor or thermocouple, which may be used to measuretemperature at a location proximate to upper cooking chamber 122 andprovide such measurements to the controller 110. Although TS1 176-1 isillustrated as a probe extending proximate to or above bottom heatingelement 150 (e.g., to or below a cooking plate 154) and TS2 176-2 isillustrated proximate to or below top heating element 152 (e.g., aboveribs 134 or cooking plate 154), it should be appreciated that othersensor types, positions, and configurations may be used according toalternative embodiments.

Controller 110 is a “processing device” or “controller” and may beembodied as described herein. Controller 110 may include a memory andone or more microprocessors, microcontrollers, application-specificintegrated circuits (ASICS), CPUs or the like, such as general orspecial purpose microprocessors operable to execute programminginstructions or micro-control code associated with operation of ovenappliance 100, and controller 110 is not restricted necessarily to asingle element. The memory may represent random access memory such asDRAM, or read only memory such as ROM, electrically erasable,programmable read only memory (EEPROM), or FLASH. In one embodiment, theprocessor executes programming instructions stored in memory. The memorymay be a separate component from the processor or may be includedonboard within the processor. Alternatively, controller 110 may beconstructed without using a microprocessor (e.g., using a combination ofdiscrete analog or digital logic circuitry; such as switches,amplifiers, integrators, comparators, flip-flops, AND gates, and thelike) to perform control functionality instead of relying upon software.

Turning now to FIGS. 2 through 5 , various views are providedillustrating, in particular, upper cooking chamber 122 of upper oven120. As shown, upper cooking chamber 122 is generally defined by a backwall 126, a top wall 128 and a bottom wall 130 spaced from top wall 128along the vertical direction V by opposing side walls 132 (e.g., a firstwall and a second wall). Optionally, a front plate 136 may be attachedto the walls to define the upper opening 123. For instance, front plate136 may extend along bottom wall 130, top wall 128, and the opposingside walls 132 about upper opening 123. In turn, gasket 114 may bemounted on or engaged with front plate 136 (e.g., when the correspondingupper door is closed). In some embodiments opposing side walls 132include embossed ribs 134 such that a baking rack containing food itemsmay be slidably received onto embossed ribs 134 and may be moved intoand out of upper cooking chamber 122 when door 124 is open. Optionally,such walls 126, 128, 130, 132 may be included within an outer casing 146of cabinet 101, as is understood.

As shown, upper oven includes one or more heating elements to heat uppercooking chamber 122 (e.g., as directed by controller 110 as part of acooking operation). For instance, a bottom heating element 150 may bemounted at a bottom portion of upper cooking chamber 122 (e.g., abovebottom wall 130). Additionally or alternatively, a top heating element152 may be mounted at a top portion of upper cooking chamber 122 (e.g.,below top wall 128). Bottom heating element 150 and top heating element152 may be used independently or simultaneously to heat upper cookingchamber 122, perform a baking or broil operation, perform a cleaningcycle, etc.

The heating elements 150, 152 may be provided as any suitable heater forgenerating heat within upper cooking chamber 122. For instance, eitherheating element may include an electric heating element (e.g.,resistance wire elements, radiant heating element, electric tubularheater or CALROD®, halogen heating element, etc.). Additionally oralternatively, either heating element may include a gas burner.

In optional embodiments, a cooking plate 154 is provided within uppercooking chamber 122. Specifically, cooking plate 154 is disposed abovebottom heating element 150 and may generally cover the same. Along withbeing disposed above bottom heating element 150, cooking plate 154 isdisposed below top heating element 152 and may be disposed below (e.g.,at a lower vertical height than) each of the embossed ribs. In certainembodiments, cooking plate 154 is located at or near the same verticalheight as the bottommost edge of upper opening 123. Thus, cooking plate154 may generally be disposed proximal to the lower end of the cookingchamber 122.

When mounted within cooking chamber 122, cooking plate 154 may extendalong the transverse direction T between a front end and a rear end,along the lateral direction L between a first lateral end and a secondlateral end, and along the vertical direction V between an upper cookingsurface 156 and a lower surface. The cooking surface 156, in particular,may be disposed between the bottom wall 130 and the top wall 128.Moreover, cooking surface 156 may be proximal to the bottom wall 130and, thus, distal to the top wall 128. In some embodiments, cookingplate 154 is provided as a solid nonpermeable member. Thus, food orfluids may be prevented from passing through cooking plate 154 (e.g.,along the vertical direction V or perpendicular to cooking surface 156).In certain embodiments, cooking plate 154 includes or is formed from aconductive metal material, such as cast iron, steel, or aluminum (e.g.,including alloys thereof). In additional or alternative embodiments,cooking plate 154 includes or is formed from a heat-retaining material,such as clay, stone (e.g., cordierite), ceramic, cast iron, orceramic-coated carbon steel.

As shown, the cooking plate 154 may be disposed directly above (e.g., invertical alignment with) the bottom heating element 150. Moreover,cooking plate 154 may define a horizontal footprint that spans acrosshorizontal footprint of bottom heating element 150. In turn, cookingplate 154 may fully cover bottom heating element 150. When mountedwithin cooking chamber 122, cooking plate 154 may block or otherwiseprevent access to bottom heating element 150, such as by a user reachinginto the cooking chamber 122. Additionally or alternatively, the bottomheating element 150 may be held out of view such that a user is unableto see the bottom heating element 150. During use, heat generated atbottom heating element 150 may be directed upward to a lower surface ofcooking plate 154. As noted, bottom heating element 150 may bevertically aligned with (e.g., directly beneath) the cooking plate 154.The heat generated at bottom heating element 150 may thus be guidedprimarily or initially to the underside of cooking plate 154.

One or more temperature sensors (e.g., TS1 176-1) may be providedproximal to the bottom wall 130 (i.e., distal to top wall 128) in orotherwise within thermal communication with cooking chamber 122, forinstance, to detect the temperature of bottom heating element 150 orcooking plate 154. Optionally, TS1 176-1 may be mounted or held betweenthe bottom heating element 150 and the cooking plate 154. In someembodiments, a TS1 176-1 is disposed against (e.g., a bottom surface of)cooking plate 154. As an example, TS1 176-1 may be disposed on a bottomsurface of cooking plate 154 (e.g., when cooking plate 154 is mountedwithin cooking chamber 122). As an additional or alternative example,TS1 176-1 may be held within a recess in cooking plate 154. As anadditional or alternative example, TS1 176-1 may be embedded withincooking plate 154.

Additionally or alternatively, one or more temperature sensors (e.g.,TS2 176-2) may be provided proximal to the top wall 128 (i.e., distal tobottom wall 130) in or otherwise within thermal communication withcooking chamber 122, for instance, to detect the temperature of topheating element 152 or cooking chamber 122, generally. Optionally, TS2176-2 may be mounted between the top wall 128 and the cooking plate 154(e.g., above TS1 176-1). In some embodiments, TS2 176-2 is mounted at orbelow heating element 152. Specifically, TS2 176-2 may be laterallypositioned between the side walls 132 (e.g., at substantially thelateral middle of cooking chamber 122). As an example, TS2 176-2 may beconnected to or otherwise supported on back wall 126 (e.g., via amechanical fastener, clip, or hook).

When assembled, the temperature sensor(s) 176-1, 176-2 may be operablycoupled to controller 110. Moreover, the controller 110 may beconfigured to control top heating element 152 or bottom heating element150 based on one or more temperatures detected at the temperaturesensor(s) 176-1, 176-2 (e.g., as part of a cooking operation). In someembodiments, a cooking operation initiated by the controller 110 maythus include detecting one or more temperatures of TS1 176-1 and TS2176-2, and directing heat output from (e.g., a heat setting of) topheating element 152 or bottom heating element 150 based on the detectedtemperature(s).

As an example, and turning to FIGS. 6 and 7 (i.e., 6A, 7A, 6B, and 7B),graphs are provided to illustrate a cooking operation directed bycontroller 110 (FIG. 1 ) in operative communication with the heatingelements 150, 152 (FIG. 5 ) and temperature sensors 176-1, 176-2 (FIG. 5). In particular, FIGS. 6A and 6B each provide a graph of temperaturelines TL-1, TL-2 detected at TS1 176-1 and TS2 176-2, respectively.FIGS. 7A and 7B each provide a graph of output line P-1, P-2 for poweroutput (e.g., as dictated by a duty cycle) at bottom heating element 150and top heating element 152, respectively. Although the illustratedpower output lines P-1, P-2 illustrate the binary active-inactive statesof a duty cycle, substitution may be made of a duty cycle for aTRIAC-regulated power cycle wherein power output is directed as apercentage of maximum power output, as would be understood.

As shown in FIGS. 6A and 7A, a cooking operation (e.g.,high-intensity-cooking operation) may include a preheat phase CP inwhich one or more preheating cycles are executed in order to prepare thecooking chamber for one or more cooking phases. Thus, the top heateroutput P-2 and the bottom heater output P-1 may be directed according toa preheating cycle. In the preheating cycle, one predetermined preheatduty cycle or heat output (e.g., top heat output setting) may be set forthe top heating element and another duty cycle or heat output (e.g.,bottom heat output) may be set for the bottom heating element. Thus, topheater output P-2 during the preheat phase CP may correspond to the topheat output setting for the preheating cycle while the bottom heateroutput P-1 during the preheat phase CP may correspond to the bottom heatoutput setting for the preheating cycle.

In some embodiments, a multi-threshold cycle is provided for the preheatphase CP. In a multi-threshold preheating cycle, the bottom heateroutput P-1 may be initially directed to at a relatively high bottomoutput setting (e.g., between 80% and 100%) while the top heater outputP-2 is restricted (e.g., at 0%). As shown, temperature (e.g., asmeasured along TL-1 and TL-2) increases within the oven chamber untilone or more pre-cooking (e.g., preheating) thresholds are met. In theillustrated embodiment, the preheating cycle may continue at the bottomheat output setting until a bottom sensor preheat threshold Bp is met orexceeded (e.g., at TL-1). Subsequently (e.g., in response to Bp beingmet or exceed), the preheat cycle may direct the bottom heater outputP-1 to an inhibited (e.g., inactive or relatively low, such as between0% and 25%) state while the top heater output P-2 is directed to arelatively high top output setting (e.g., between 80% and 100%). Thepreheating cycle may then continue at the top heat output setting untila top sensor preheat threshold Op is met or exceeded (e.g., at TL-2).The preheating cycle and phase CP may end or be halted in response tothe top sensor preheat threshold Op being met or exceeded. Notably, thecooking plate 166 or surface 168 within the cooking chamber 122 may bebrought to a relatively high temperature without reaching excessive orundesirable temperatures within the rest of cooking chamber 122.

It is noted that although a multi-threshold cycle for a preheat phase CPis illustrated for a high-intensity-cooking operation in FIGS. 6A and7A, alternative embodiments may include a single-limit cycle (e.g., asillustrated in FIGS. 6B and 7B). Additionally or alternatively, thepreheating cycle may continue at the bottom and top heat output settingsuntil a set preheat time limit (e.g., initiated at the start of thepreheating cycle) is reached. Thus, the preheating cycle and phase CPmay end or be halted in response to the set preheat time limit expiring.

Following the preheat cycle or phase CP (e.g., immediately thereafter orin response to the end of the preheat phase CP), a new phase with one ormore additional cycles, such as a cooking cycle or a standby cycle maybe executed. In the illustrated embodiments, a maintenance or standbycycle is provided as part of a standby phase MP. As shown, in thestandby phase MP, bottom heating element 150 or top heating 152 is/aregenerally directed to maintain the bottom temperature and oventemperatures at a corresponding predetermined target or temperature, forexample using a proportional-integral-derivative (PID) control scheme orwithin a range of temperatures (e.g., a set range relative to Bp or Op).In one embodiment, the standby cycle of the standby phase MP ischaracterized by activation of both the bottom heating element and topheating element. Activation of bottom heating element and top heatingelement may occur sequentially or simultaneously.

Following the preheat phase CP or standby phase MP, a cooking phase CCmay be initiated to execute one or more cooking cycles (e.g., inresponse to a set time condition or a directed user input). Generally,such cooking cycles direct the bottom heating element 150 or top heatingelement 152 according to a predetermined scheme or sequence.

In some embodiments, a first cooking (e.g., initial broil) cycle IB isprovided with the cooking phase CC. Optionally, upon initiating thecooking phase CC, a first cooking (e.g., initial broil) cycle IB isstarted. The top heating element may be activated according to the firstcooking cycle IB. For instance, the first cooking cycle IB may directthe top heating element to a predetermined cooking target or thresholdAF (e.g., PID setpoint or set temperature range for thermostaticcontrol). Optionally, the predetermined cooking threshold AF may beequal to a predetermined maximum threshold TX. Additionally oralternatively, first cooking cycle may include a first duty cycle orheat output (e.g., heat output setting) for the top heating element.Thus, activation of the top heating element may be directed to the firstheat output. In the illustrated embodiments, the first heat output is ahigh heat output, such as 100% or a duty cycle wherein the top heatingelement is maintained at, for example, a continuous active state for theduration of the first cooking cycle IB (e.g., until a set time orpredetermined cooking threshold AF is reached). In the illustratedembodiments, the first cooking cycle IB or activation of the top heatingelement may continue until the predetermined cooking threshold AF isexceeded. Optionally, the bottom heating element may be held in theinhibited state (e.g., inactive or, alternatively, reduced state, suchas between 0% and 25%) as part of the first cooking cycle IB (e.g., asshown). Alternatively, though, the bottom heating element may bedirected to its own first duty cycle or heat output (e.g., heat outputsetting) that is separate from the first duty cycle or heat output forthe top heating element Separate from or in addition to the firstcooking cycle IB, a second cooking (e.g., revised broil or bake) cycleSB may be initiated for the cooking phase CC. The second cooking cycleSB may include a periodic heat output (e.g., for the top heating elementor the bottom heating element) or a predetermined temperature (e.g., PIDsetpoint or set temperature range for thermostatic control), which maybe separate from or identical to the predetermined cooking threshold AFof the first cooking cycle IB. The second cooking cycle SB may include,for instance, a second duty cycle or heat output (e.g., low outputsetting) for the top heating element. Thus, activation (i.e.,reactivation) of the top heating element may be directed to the secondheat output. Optionally, the second heat output may be less than thefirst heat output. In other words, the active time of the duty cycle orpercentage of power output at the top heating element for the secondheat output may be less than that of the first heat output.Alternatively, the second heat output may be equal to the first heatoutput. In some embodiments, the bottom heating element is directed toits own second duty cycle or heat output (e.g., heat output setting)that is separate from the second duty cycle or heat output for the topheating element. In other words, the second cooking cycle may include asecond heat output for the bottom heating element. Additionally oralternatively, a predetermined temperature (e.g., PID setpoint or settemperature range for thermostatic control) may be provided for thebottom heating element (e.g., to be detected at TS2).

As noted, a predetermined temperature for the top heating element may beincluded with the second cooking cycle SB. For instance, thepredetermined temperature may include or be provided as a predeterminedmaximum threshold TX (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value). Thus, activation ofthe top heating element may continue until the predetermined maximumthreshold TX is met or exceeded. Upon being exceeded, the second cookingcycle SB may (e.g., temporarily) restrict or halt top power output P-2.In turn, activation of the top heating element during the second cookingcycle SB may be according to the predetermined maximum threshold TX.Along with the predetermined maximum threshold TX, a predeterminedminimum threshold TN (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value), which is less thanthe predetermined maximum threshold TX, may be provided. Specifically,the predetermined minimum threshold TN may set a baseline for activationof top heating element. For instance, upon falling below thepredetermined minimum threshold TN, the second cooking cycle SB mayincrease power output P-2 (e.g., to the second duty cycle or heatoutput). In turn, activation of the top heating element during thesecond cooking cycle SB may be further according to the predeterminedminimum threshold TN.

As would be understood in light of the present disclosure, the secondcooking cycle SB may continue to cycle (increase-decrease heatgeneration at) the top heating element according to the correspondingpredetermined temperature (e.g., between the predetermined minimum andmaximums TX and TN), for instance, until a user-selected endpoint (e.g.,time limit for the cooking phase CC or a general input indicating a newtemperature for the cooking chamber or an end to cooking operationsaltogether).

In some embodiments, a recharge phase RP including a recharge cycle isinitiated following the cooking phase CC (e.g., immediately thereafteror following an intermediate period immediately following the cookingphase CC). Generally, the recharge phase RP may be understood as a phasein which the cooking chamber is prepared for cooking additional orsuccessive food items in a subsequent cooking cycle. As an example, therecharge phase RP may include a recharge cycle directing one or both ofthe heating elements, to an inhibited state (e.g., for a set rechargetime period of no heat time). After being directed to the inhibitedstate (e.g., following expiration of the set recharge timer measuring aportion the recharge no heat time), the bottom heating element may beactivated and directed to a relatively high bottom output setting (e.g.,between 80% and 100%) while the top heater output P-2 is restricted(e.g., at 0%). Optionally, activation of the bottom heating element isconditioned (e.g., separate from or in addition to the set rechargetimer) on a temperature at the oven temperature sensor TS2. Forinstance, the temperature at the oven temperature sensor TS2 may berequired to be less than a recharge minimum threshold (Rmin). Upon beingactivated, the bottom heating element may continue at the bottom outputsetting, for instance, until a recharge maximum threshold (Rmax) ismeasured (e.g., at the bottom temperature sensor TS1). Notably, inpractice, the duration of the recharge phase RP may be less than theduration of the preheat cycle CP. Advantageously, excessive heat may beprevented from accumulating within the cooking chamber 122, generally,while maintaining the cooking plate 166 or surface 168 at a relativelyhigh temperature (e.g., for cooking additional or successive fooditems).

Following the recharge phase RP, one or more additional standby orcooking phases may be initiated, as would be understood in light of thepresent disclosure.

As shown in FIGS. 6B and 7B, a cooking operation (e.g., bread-cookingoperation) may include a preheat phase CP in which one or morepreheating cycles are executed in order to prepare the cooking chamberfor one or more cooking phases. Thus, the top heater output P-2 and thebottom heater output P-1 may be directed according to a preheatingcycle. In the preheating cycle, one predetermined preheat duty cycle orheat output (e.g., top heat output setting) may be set for the topheating element and another duty cycle or heat output (e.g., bottom heatoutput) may be set for the bottom heating element. Thus, top heateroutput P-2 during the preheat phase CP may correspond to the top heatoutput setting for the preheating cycle while the bottom heater outputP-1 during the preheat phase CP may correspond to the bottom heat outputsetting for the preheating cycle.

In some embodiments, a single-limit cycle is provided for the preheatphase CP. In a single-limit preheating cycle, one or both heater outputsP-1, P-2 is directed according to a single limit (e.g., time limit ortemperature threshold at TS1 or TS2). For instance, the bottom heateroutput P-1 may directed to a bottom output setting that is periodic(e.g., cycles on-off according to a corresponding duty cycle for thepreheating cycle). Additionally or alternatively, the top heater outputP-2 may be directed to a top output setting that is periodic (e.g.,cycles on-off according to a corresponding duty cycle for the preheatingcycle). In the illustrated embodiment, the preheating cycle may continueat the top or bottom heat output setting until a top sensor preheatthreshold Op is met or exceeded (e.g., at TL-2). The preheating cycleand phase CP may end or be halted in response to the top sensor preheatthreshold Op being met or exceeded.

It is noted that although a single-limit cycle for a preheat phase CP isillustrated for a bread-cooking operation in FIGS. 6B and 7B,alternative embodiments may include a multi-threshold cycle (e.g., asillustrated in FIGS. 6A and 7A). Additionally or alternatively, thepreheating cycle may continue at the bottom and top heat output settingsuntil a set preheat time limit (e.g., initiated at the start of thepreheating cycle) is reached. Thus, the preheating cycle and phase CPmay end or be halted in response to the set preheat time limit expiring.

Following the preheat cycle or phase CP (e.g., immediately thereafter orin response to the end of the preheat phase CP), a new phase with one ormore additional cycles, such as a cooking cycle or a standby cycle maybe executed. In the illustrated embodiments, a maintenance or standbycycle is provided as part of a standby phase MP. As shown, in thestandby phase MP, bottom heating element 150 or top heating element 152are generally directed to maintain the cooking surface temperature andoven temperatures at a standby target or temperature, for example usinga proportional-integral-derivative (PID) control scheme or within arange of temperatures. In one embodiment, the standby cycle of thestandby phase MP is characterized by activation of both the bottomheating element and top heating element. Activation of bottom heatingelement and top heating element may occur sequentially orsimultaneously.

Following the preheat phase CP or standby phase MP, a cooking phase CCmay be initiated to execute one or more cooking cycles (e.g., inresponse to a set time condition or a directed user input). Generally,such cooking cycles direct the bottom heating element 150 or top heatingelement 152 according to a predetermined scheme or sequence.

In some embodiments, a first cooking (e.g., initial broil) cycle IB isprovided with the cooking phase CC. Optionally, upon initiating thecooking phase CC, a first cooking (e.g., initial broil) cycle IB isstarted. The top heating element may be activated according to the firstcooking cycle IB. For instance, the first cooking cycle IB may directthe top heating element to a predetermined cooking target or thresholdAF (e.g., PID setpoint or set temperature range for thermostaticcontrol). Optionally, the predetermined cooking threshold AF may beequal to a predetermined maximum threshold TX. Additionally oralternatively, first cooking cycle may include a first duty cycle orheat output (e.g., heat output setting) for the top heating element.Thus, activation of the top heating element may be directed to the firstheat output. In the illustrated embodiments, the first heat output is ahigh heat output, such as 100% or a duty cycle wherein the top heatingelement is maintained at, for example, a continuous active state for theduration of the first cooking cycle IB (e.g., until a set time orpredetermined cooking threshold AF is reached). In the illustratedembodiments, the first cooking cycle IB or activation of the top heatingelement may continue until the predetermined temperature AF is exceeded.Optionally, the bottom heating element may be held in the inhibitedstate as part of the first cooking cycle IB (e.g., as shown).Alternatively, though, the bottom heating element may be directed to itsown first duty cycle or heat output (e.g., heat output setting) that isseparate from the first duty cycle or heat output for the top heatingelement.

Separate from or in addition to the first cooking cycle IB, a secondcooking (e.g., revised broil or bake) cycle SB may be initiated for thecooking phase CC. The second cooking cycle SB may include a periodicheat output (e.g., for the top heating element or the bottom heatingelement) or a predetermined temperature (e.g., PID setpoint or settemperature range for thermostatic control), which may be separate fromor identical to the predetermined temperature of the first cooking cycleIB. The second cooking cycle SB may include, for instance, a second dutycycle or heat output (e.g., low output setting) for the top heatingelement. Thus, activation (i.e., reactivation) of the top heatingelement may be directed to the second heat output. Optionally, thesecond heat output may be less than the first heat output. In otherwords, the active time of the duty cycle or percentage of power outputat the top heating element for the second heat output may be less thanthe first heat output. Alternatively, the second heat output may beequal to the first heat output. In some embodiments, the bottom heatingelement is directed to its own second duty cycle or heat output (e.g.,heat output setting) that is separate from the second duty cycle or heatoutput for the top heating element. In other words, the second cookingcycle may include a second heat output for the bottom heating element.Additionally or alternatively, a predetermined temperature (e.g., PIDsetpoint or set temperature range for thermostatic control) may beprovided for the bottom heating element (e.g., to be detected at TS2).

As noted, a predetermined temperature for the top heating element may beincluded with the second cooking cycle SB. For instance, thepredetermined temperature may include or be provided as a predeterminedmaximum threshold TX (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value). Thus, activation ofthe top heating element may continue until the predetermined maximumthreshold TX is met or exceeded. Upon being exceeded, the second cookingcycle SB may (e.g., temporarily) restrict or halt top power output P-2.In turn, activation of the top heating element during the second cookingcycle SB may be according to the predetermined maximum threshold TX.Along with the predetermined maximum threshold TX, a predeterminedminimum threshold TN (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value), which is less thanthe predetermined maximum threshold TX, may be provided. Specifically,the predetermined minimum threshold TN may set a baseline for activationof top heating element. For instance, upon falling below thepredetermined minimum threshold, the second cooking cycle SB mayincrease power output P-2 (e.g., to the second duty cycle or heatoutput). In turn, activation of the top heating element during thesecond cooking cycle SB may be further according to the predeterminedminimum threshold TN.

As would be understood in light of the present disclosure, the secondcooking cycle SB may continue to cycle (increase-decrease heatgeneration at) the top heating element according to the correspondingpredetermined temperature (e.g., between the predetermined minimum andmaximums TX and TN), for instance, until a set endpoint. In theillustrated embodiments, a set time period ES is provided. Specifically,the set time period ES may dictate the length of time for which thesecond cooking cycle SB may continue (e.g., measured from the start ofthe second cooking cycle SB). Upon expiration of the set time period ES,the second cooking cycle SB may end (e.g., to initiate another cycle orphase, such as a third cooking cycle).

Separate from or in addition to the first or second cooking cycles IB orSB, a third (e.g., post rise) cooking cycle DB may be initiated for thecooking phase CC. The third cooking cycle DB may include a periodic heatoutput (e.g., for the top heating element or the bottom heating element)or a predetermined temperature (e.g., PID setpoint or set temperaturerange for thermostatic control), which may be distinct from (e.g., lessthan) the predetermined cooking threshold AF of the first cooking cycleIB or the second cooking cycle SB. The third cooking cycle DB mayinclude, for instance, a third duty cycle or heat output (e.g., lowoutput setting) for the top heating element. Thus, activation (i.e.,reactivation) of the top heating element may be directed to the thirdheat output. Optionally, the third heat output may be less than thesecond heat output. In other words, the active time of the duty cycle orpercentage of power output at the top heating element for the third heatoutput may be less than the second heat output. In some embodiments, thebottom heating element is directed to its own third duty cycle or heatoutput (e.g., heat output setting) that is separate from the third dutycycle or heat output for the top heating element. In other words, thethird cooking cycle may include a third heat output for the bottomheating element. Additionally or alternatively, a predeterminedtemperature (e.g., PID setpoint or set temperature range forthermostatic control) may be provided for the bottom heating element(e.g., to be detected at TS2).

As noted, a predetermined temperature for the top heating element may beincluded with the third cooking cycle DB. The predetermined temperatureof the third cooking cycle may be less than the predeterminedtemperature of the second cooking cycle. The predetermined temperatureof the third cooking cycle may include or be provided as a predeterminedmaximum threshold DX (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value). Thus, activation ofthe top heating element may continue until the predetermined maximumthreshold DX is met or exceeded. Upon being exceeded, the third cookingcycle DB may (e.g., temporarily) restrict or halt top power output P-2.In turn, activation of the top heating element during the third cookingcycle DB may be according to the predetermined maximum threshold DX.Along with the predetermined maximum threshold DX, a predeterminedminimum threshold DN (e.g., oven temperature value selected by a user orset by a fixed value from the user-selected value), which is less thanthe predetermined maximum threshold DX, may be provided. Specifically,the predetermined minimum threshold DN may set a baseline for activationof top heating element. For instance, upon falling below thepredetermined minimum threshold DN, the third cooking cycle DB mayincrease power output P-2 (e.g., to the third duty cycle or heatoutput). In turn, activation of the top heating element during the thirdcooking cycle DB may be further according to the predetermined minimumthreshold DN.

As would be understood in light of the present disclosure, the thirdcooking cycle DB may continue to cycle (increase-decrease heatgeneration at) the top heating element according to the correspondingpredetermined temperature (e.g., between the predetermined minimum andmaximums DX and DN), for instance, until a user-selected endpoint (e.g.,time limit for the cooking phase CC or a general input indicating a newtemperature for the cooking chamber or an end to cooking operationsaltogether).

Following the cooking phase, one or more additional standby or rechargephases may be initiated, as would be understood in light of the presentdisclosure.

Referring now to FIGS. 8 through 10 , the present disclosure may furtherbe directed to methods (e.g., method 800, 900, or 1000) of operating anoven appliance, such as appliance 100. In exemplary embodiments, thecontroller 110 may be operable to perform various steps of a method inaccordance with the present disclosure.

The methods (e.g., 800, 900, or 1000) may occur as, or as part of, acooking operation (e.g., short-cycle cooking operation) of ovenappliance 100. In particular, the methods (e.g., 800, 900, or 1000)disclosed herein may advantageously facilitate one portion of a cookingchamber being brought to an appropriate (e.g., relatively high)temperature for a discrete period without reaching excessive orundesirable temperatures within the rest of the cooking chamber.Additionally or alternatively, the methods (e.g., 800, 900, or 1000) mayadvantageously permit multiple cooking cycles to be performed inrelatively quick succession (e.g., without requiring significant coolingof the cooking chamber).

It is noted that the order of steps within methods 800, 900, and 1000are for illustrative purposes. Moreover, none of the methods 800, 900,and 1000 are mutually exclusive. In other words, methods within thepresent disclosure may include one or more of methods 800, 900, and1000. All may be adopted or characterized as being fulfilled in a commonoperation. Except as otherwise indicated, one or more steps in the belowmethod 800, 900, or 1000 may be changed, rearranged, performed in adifferent order, or otherwise modified without deviating from the scopeof the present disclosure.

Turning especially to FIG. 8 , at 810, the method 800 includes directingthe top heating element according to a preheat cycle of a cookingoperation (e.g., high-intensity-cooking operation or bread-cookingoperation). Generally, the preheat cycle includes a predeterminedpreheat heat output (e.g., duty cycle or heat output) for the topheating element. In other words, a preheat heat output setting isprovided for the top heating element such that the duty cycle or theintensity of heat output for the top heating element may be set inadvance. Additionally or alternatively, the preheat cycle may include apredetermined preheat heat output (e.g., duty cycle or heat output) forthe bottom heating element. In other words, a preheat heat outputsetting is provided for the bottom heating element such that the dutycycle or the intensity of heat output for the bottom heating element maybe set in advance.

At 820, the method 800 includes determining expiration of the preheatcycle. As described above, the preheat cycle may include a set endpoint,such as an set time condition or duration of the preheat cycle or one ormore temperature thresholds. Reaching the set endpoint may thus resultin a determined expiration of the preheat cycle.

Expiration of the preheat cycle may prompt preheat heat output for thetop heating element or the bottom heating element to be halted. Inoptional embodiments, the preheat cycle includes an oven temperaturepreheat threshold (e.g., threshold for temperature measured at the oventemperature sensor). In response to detecting a temperature at the oventemperature sensor that is greater than the oven temperature preheatthreshold, the preheat heat output for the top heating element or thebottom heating element may be halted. Additionally or alternatively, thepreheat heat output for the bottom heating element may be halted and thepreheat heat output for the top heating element may be initiated. Inadditional or alternative embodiments, the preheat cycle includes abottom temperature preheat threshold (e.g., threshold for temperaturemeasured at the bottom temperature sensor). In response to detecting atemperature at the bottom temperature sensor that is greater than thebottom temperature preheat threshold, the preheat heat output for thetop heating element or the bottom heating element may be halted.

At 830, the method 800 includes directing one or more heating elementsaccording to a standby cycle in response to 820. In particular, the topheating element or the bottom heating element may be directed to apredetermined standby temperature (e.g., target temperature, asdescribed above). The top heating element may be directed to generateheat (e.g., at a standby heat output) in order to meet or maintain thestandby temperature (e.g., using a PID scheme or thermostatic range oftemperatures with a maximum temperature and a minimum temperature). Insome such embodiments, the standby temperature for the top heatingelement is an oven temperature detected at the oven temperature sensor.Additionally or alternatively, the bottom heating element may bedirected to generate heat (e.g., at a standby heat output) in order tomeet or maintain the standby temperature (e.g., using a PID scheme orthermostatic range of temperatures with a maximum temperature and aminimum temperature). In some such embodiments, the standby temperaturefor the bottom heating element is a bottom temperature detected at thebottom temperature sensor. The standby temperature for the top heatingelement may be distinct from (e.g., lower than) the standby temperaturefor the bottom heating element.

At 840, the method 800 includes determining expiration of the standbycycle. The standby cycle may include a set input or condition to haltthe standby cycle or otherwise indicate expiration of the standby cycle.For instance, the standby cycle may include a set time condition orduration of the standby cycle. Such a time condition may be measured asa countdown or count up (e.g., by a timer initiated at the start of thestandby cycle). Reaching the end of the countdown or the count up may,in turn, indicate expiration of the standby cycle. Additionally oralternatively, expiration of the standby cycle may be conditioned on auser input. Such a user input may be received during the standby cycle(e.g., at the control panel or user interface of the oven appliance) andindicate that a user wants to start another (e.g., cooking) cycle.

At 850, the method 800 includes directing one or more heating elementsaccording to a first cooking cycle in response to 840. In particular,the top heating element or the bottom heating element may be directed toa predetermined cooking threshold. In some embodiments, the top heatingelement is directed to a corresponding predetermined cooking threshold(e.g., to be detected at the oven temperature sensor). A top heat outputmay be included with the first cooking cycle that is a high heat output(e.g., continuously active or, alternatively, elevated output, such asbetween 80% and 100%). Thus, the first cooking cycle may drive oractivate the top heating element at the high heat output until atemperature is detected at the oven temperature sensor that is greaterthan or equal to the predetermined cooking threshold of the top heatingelement. In optional embodiments, the bottom heating element is held inan inhibited state (e.g., inactive or, alternatively, reduced state,such as between 0% and 25%) according to the first cooking cycle duringthe high heat output of the top heating element.

At 860, the method 800 includes directing the heating elements accordingto a second cooking cycle following the first cooking cycle. Forinstance, the second cooking cycle may be directed or prompted inresponse to detecting an oven temperature that is greater than or equalto the predetermined cooking threshold (e.g., following the firstcooking cycle). In some embodiments, the heat output for the top heatingelement is lower in the second cooking cycle than in the first cookingcycle. For instance, the second cooking cycle may include a periodicheat output for the top heating element (i.e., a top heat output of thesecond cooking cycle that is less than the top heat output of the firstcooking cycle). Additionally or alternatively, the second cooking cyclemay include a predetermined cooking temperature (e.g., targettemperature for a PID control scheme or range of temperatures) that thetop heating element maintains for the duration of the second cookingcycle.

Separate from or in addition to the heat output for the top heatingelement, the second cooking cycle may include a predetermined heatoutput for the bottom heating element. Thus, the bottom heating elementmay be directed to its own heat output that is separate from the dutycycle or heat output for the top heating element.

At 870, the method 800 includes directing the heating elements accordingto one or more additional cycles (e.g., recharge cycles, standby cycles,or cooking cycles) following the second cooking cycle.

In some embodiments, 870 includes a recharge cycle following the secondcooking cycle (e.g., in response to a determined expiration of thesecond cooking cycle, such as might be indicated by a user input or settime condition or duration for ending the second cooking cycle). Forinstance, 870 may include directing the top heating element or thebottom heating element to an inhibited state (e.g., inactive or,alternatively, reduced state, such as between 0% and 25%) according to arecharge cycle. The inhibited state of one or both of the heatingelements may be maintained until a minimum recharge threshold isdetected (e.g., at the oven sensor). Thus, 870 may further includedetecting an oven temperature less than a minimum recharge thresholdwhile the heating element(s) is/are in the inhibited state according tothe recharge cycle. In optional embodiments, one or both heatingelements may subsequently be activated as part of the recharge cycle.For instance, the recharge cycle may include a high heat output (e.g.,continuously active or, alternatively, elevated output, such as between80% and 100%) of the bottom heating element that is conditioned on or inresponse to detecting the oven temperature less than the minimumrecharge threshold. In some such embodiments, the high heat output ofthe bottom heating element is directed to continue until a predeterminedmaximum recharge threshold is reached (e.g., as detected by the bottomtemperature sensor). Optionally, the top heating element may bemaintained (e.g., continued to be maintained) in the inhibited stateaccording to the recharge cycle during the high heat output of thebottom heating element.

In certain embodiments, 870 includes a second standby cycle followingthe second cooking cycle or the recharge cycle (e.g., in response to adetermined expiration of the recharge cycle, such as might be indicatedby detecting a bottom temperature that is greater than or equal to themaximum recharge threshold). The second standby cycle may be similar toor, alternatively, unique from the first standby cycle of 830. Inparticular, the top heating element or the bottom heating element may bedirected to a corresponding second predetermined standby temperature(e.g., target temperature, as described above) that is identical to or,alternatively, different from the predetermined standby temperature at830.

The bottom heating element may be directed to generate heat (e.g., at astandby heat output) in order to meet or maintain the correspondingsecond standby temperature (e.g., using a PID scheme or thermostaticrange of temperatures with a maximum temperature and a minimumtemperature). In some such embodiments, the second standby temperaturefor the bottom heating element is a bottom temperature detected at thebottom temperature sensor. The second standby temperature may be lessthan or equal to the predetermined maximum recharge threshold. In turn,the second standby cycle may include directing the bottom heatingelement to an inhibited state (e.g., for a limited portion of the secondstandby cycle) before again activating the second heating elementaccording to the second standby temperature.

The top heating element may be directed to generate heat (e.g., at astandby heat output) in order to meet or maintain the correspondingsecond standby temperature (e.g., using a PID scheme or thermostaticrange of temperatures with a maximum temperature and a minimumtemperature). In some such embodiments, the second standby temperaturefor the top heating element is an oven temperature detected at the oventemperature sensor. Optionally, the second standby temperature for thetop heating element may be distinct from (e.g., lower than) the secondstandby temperature for the bottom heating element.

In additional or alternative embodiments, 870 includes a third cookingcycle following the second cooking cycle (e.g., in response to adetermined expiration of the second cooking cycle, such as might beindicated by a user input or set time condition or duration for endingthe second cooking cycle). The predetermined cooking temperature of 860may be a second-cycle predetermined temperature while the third cookingcycle includes its own third-cycle predetermined temperature (e.g.,different from or less than the second-cycle predetermined temperature)for the top heating element or the bottom heating element.

In certain embodiments, expiration of the second cooking cycle isconditioned on expiration of a set time period (i.e., dictating thepermitted duration of the second cooking cycle from the start of thesecond cooking cycle to the end of the second cooking cycle). Thus, inresponse to determining expiration of the set time period for the secondcooking cycle, the third cooking cycle may be initiated such that heatoutput of the top heating element or the bottom heating element is/areadjusted. The adjustments may require directing one or both of theheating elements to an inhibited state (e.g., for a limited portion ofthe third cooking cycle).

Additionally or alternatively, the top heating element may be directedaccording to a third heat output. In some embodiments, the heat outputfor the top heating element is lower in the third cooking cycle than inthe second cooking cycle. For instance, the third cooking cycle mayinclude a periodic heat output for the top heating element (i.e., a topheat output of the third cooking cycle that is less than the top heatoutput of the second cooking cycle). Additionally or alternatively, thethird cooking cycle may include the third-cycle predetermined cookingtemperature (e.g., target temperature for a PID control scheme or rangeof temperatures) that the top heating element maintains for the durationof the third cooking cycle.

Separate from or in addition to the heat output for the top heatingelement, the third cooking cycle may include a predetermined heat outputfor the bottom heating element. Thus, the bottom heating element may bedirected to its own heat output that is separate from the duty cycle orheat output for the top heating element.

As would be understood, following 870, further additional cycles (e.g.,recharge, standby, or cooking cycles) may be executed or the method 800may be halted altogether (e.g., in response to expiration of a cookingoperation time limit or corresponding user input).

Turning now especially to FIG. 9 , at 910, the method 900 includesdirecting one or more heating elements according to a first cookingcycle (e.g., following one or more prior cycles, such as a preheat orstandby cycle) of a cooking operation, such as a high-intensity-cookingoperation. In particular, the top heating element or the bottom heatingelement may be directed to a predetermined cooking threshold. In someembodiments, the top heating element is directed to a correspondingpredetermined cooking threshold (e.g., to be detected at the oventemperature sensor). A top heat output may be included with the firstcooking cycle that is a high heat output (e.g., continuously active or,alternatively, elevated output, such as between 80% and 100%). Thus, thefirst cooking cycle may drive or activate the top heating element at thehigh heat output until a temperature is detected at the oven temperaturesensor that is greater than or equal to the predetermined cookingthreshold of the top heating element. In optional embodiments, thebottom heating element is held in an inhibited state (e.g., inactive or,alternatively, reduced state, such as between 0% and 25%) according tothe first cooking cycle during the high heat output of the top heatingelement.

At 920, the method 900 includes detecting an oven temperature greaterthan or equal to the predetermined cooking threshold. In particular, atemperature signal may be received from the oven temperature sensor. Aswould be understood, the temperature signal may generally correspond toor indicate a temperature at the oven temperature sensor. Comparison ofthis detected temperature to the predetermined cooking threshold maythus determine if the detected oven temperature is greater than or equalto the predetermined cooking threshold.

At 930, the method 900 includes directing the heating elements accordingto a second cooking cycle. Specifically, the second cooking cycle may bedirected or prompted in response to 920. In some embodiments, the heatoutput for the top heating element is lower in the second cooking cyclethan in the first cooking cycle. For instance, the second cooking cyclemay include a periodic heat output for the top heating element (i.e., atop heat output of the second cooking cycle that is less than the topheat output of the first cooking cycle). Additionally or alternatively,the second cooking cycle may include a predetermined cooking temperature(e.g., target temperature for a PID control scheme or range oftemperatures) that the top heating element maintains for the duration ofthe second cooking cycle.

Separate from or in addition to the heat output for the top heatingelement, the second cooking cycle may include a predetermined heatoutput for the bottom heating element. Thus, the bottom heating elementmay be directed to its own heat output that is separate from the dutycycle or heat output for the top heating element.

At 940, the method 900 includes directing, following the second cookingcycle, the top heating element to an inhibited state (e.g., inactive or,alternatively, reduced state, such as between 0% and 25%) according to arecharge cycle. Optionally, the end of the second cooking cycle may beindicated by a corresponding user input (e.g., received at the controlpanel or user interface) to halt the second cooking cycle. The receiveduser input may, in turn, cause the top heating element to be directed tothe inhibited state. In some embodiments, the bottom heating element isalso directed to the inhibited state (e.g., as part of 940 andsimultaneously with the top heating element).

At 950, the method 900 includes detecting an oven temperature less thana minimum recharge threshold. Thus, a temperature signal received fromthe oven temperature sensor may indicate a temperature that is less thanthe minimum recharge threshold while the top or bottom heatingelement(s) is/are in the inhibited state at 940.

At 960, the method 900 includes directing the bottom heating elementaccording to the recharge cycle (e.g., in response to 950).Specifically, the bottom heating element may be activated at a high heatoutput (e.g., continuously active or, alternatively, elevated output,such as between 80% and 100%) of the recharge cycle. In some suchembodiments, the high heat output of the bottom heating element isdirected to continue until a predetermined maximum recharge threshold isreached (e.g., as detected by the bottom temperature sensor).Optionally, the top heating element may be maintained (e.g., continuedto be maintained) in the inhibited state according to the recharge cycleduring 960.

At 970, the method 900 includes directing the one or more heatingelements according to a standby cycle (e.g., second standby cycle)following 960 and the recharge cycle, generally (e.g., in response to adetermined expiration of the recharge cycle, such as might be indicatedby detecting a bottom temperature that is greater than or equal to themaximum recharge threshold). For instance, the bottom heating elementmay be directed to generate heat (e.g., at a standby heat output) inorder to meet or maintain the corresponding standby temperature (e.g.,using a PID scheme or thermostatic range of temperatures with a maximumtemperature and a minimum temperature). In some such embodiments, thestandby temperature for the bottom heating element is a bottomtemperature detected at the bottom temperature sensor. The standbytemperature may be less than or equal to the predetermined maximumrecharge threshold. In turn, the second standby cycle may includedirecting the bottom heating element to an inhibited state following 960and before again activating the second heating element according to thepredetermined standby temperature.

The top heating element may be directed to generate heat (e.g., at astandby heat output) in order to meet or maintain the correspondingstandby temperature (e.g., using a PID scheme or thermostatic range oftemperatures with a maximum temperature and a minimum temperature). Insome such embodiments, the standby temperature for the top heatingelement is an oven temperature detected at the oven temperature sensor.Optionally, the standby temperature for the top heating element may bedistinct from (e.g., lower than) the standby temperature for the bottomheating element at 970.

As would be understood, following 970, further additional cycles (e.g.,recharge, standby, or cooking cycles) may be executed or the method 900may be halted altogether (e.g., in response to expiration of a cookingoperation time limit or corresponding user input).

Turning now especially to FIG. 10 , at 1010 the method 1000 includesdirecting one or more heating elements according to a first cookingcycle (e.g., following one or more prior cycles, such as a preheat orstandby cycle), such as a bread-cooking operation. In particular, thetop heating element or the bottom heating element may be directed to apredetermined cooking threshold. In some embodiments, the top heatingelement is directed to a corresponding predetermined cooking threshold(e.g., to be detected at the oven temperature sensor). A top heat outputmay be included with the first cooking cycle that is a high heat output(e.g., continuously active or, alternatively, elevated state, such asbetween 80% and 100%). Thus, the first cooking cycle may drive oractivate the top heating element at the high heat output until atemperature is detected at the oven temperature sensor that is greaterthan or equal to the predetermined cooking threshold of the top heatingelement. In optional embodiments, the bottom heating element is held inan inhibited state (e.g., inactive or, alternatively, reduced state,such as between 0% and 25%) according to the first cooking cycle duringthe high heat output of the top heating element.

At 1020, the method 1000 includes detecting an oven temperature greaterthan or equal to the predetermined cooking threshold. In particular, atemperature signal may be received from the oven temperature sensor. Aswould be understood, the temperature signal may generally correspond toor indicate a temperature at the oven temperature sensor. Comparison ofthis detected temperature to the predetermined cooking threshold maythus determine if the detected oven temperature is greater than or equalto the predetermined cooking threshold.

At 1030, the method 1000 includes directing the heating elementsaccording to a second cooking cycle for a set time period. Specifically,the second cooking cycle may be directed or prompted in response to1020. In some embodiments, the heat output for the top heating elementis lower in the second cooking cycle than in the first cooking cycle.For instance, the second cooking cycle may include a periodic heatoutput for the top heating element (i.e., a top heat output of thesecond cooking cycle that is less than the top heat output of the firstcooking cycle). Additionally or alternatively, the second cooking cyclemay include a predetermined cooking temperature (e.g., targettemperature for a PID control scheme or range of temperatures) that thetop heating element maintains for the duration of the second cookingcycle (i.e., for the duration of the set time period, which begins withthe start of the second cooking cycle at 1030).

Separate from or in addition to the heat output for the top heatingelement, the second cooking cycle may include a predetermined heatoutput for the bottom heating element. Thus, the bottom heating elementmay be directed to its own heat output that is separate from the dutycycle or heat output for the top heating element (e.g., for the durationof the set time period).

At 1040, the method 1000 includes determining expiration of the set timeperiod. Generally, the set time period begins with the start of thesecond cooking cycle. The set time period of the second cooking cyclemay be measured as a countdown or count up (e.g., by a timer initiatedat the start of the second cooking cycle). Reaching the end of thecountdown or the count up may, in turn, indicate expiration of thesecond cooking cycle.

At 1050, the method 1000 includes adjusting heat within the cookingchamber in response to 1040. Thus the heat output at the top heatingelement or the bottom heating element may be altered from the heatoutput provided with the second cooking cycle at 1030. For instance, athird cooking cycle may be initiated. The adjustments may requiredirecting one or both of the heating elements to an inhibited state(e.g., for a limited portion of the third cooking cycle).

In some embodiments, the predetermined cooking temperature of 1030 maybe a second-cycle predetermined temperature while the third cookingcycle includes its own third-cycle predetermined temperature (e.g.,different from or less than the second-cycle predetermined temperature)for the top heating element or the bottom heating element. Additionallyor alternatively, the top heating element may be directed according to athird heat output. In some embodiments, the heat output for the topheating element is lower in the third cooking cycle than in the secondcooking cycle. For instance, the third cooking cycle may include aperiodic heat output for the top heating element (i.e., a top heatoutput of the third cooking cycle that is less than the top heat outputof the second cooking cycle). Additionally or alternatively, the thirdcooking cycle may include the third-cycle predetermined cookingtemperature (e.g., target temperature for a PID control scheme or rangeof temperatures) that the top heating element maintains for the durationof the third cooking cycle.

Separate from or in addition to the heat output for the top heatingelement, the third cooking cycle may include a predetermined heat outputfor the bottom heating element. Thus, the bottom heating element may bedirected to its own heat output that is separate from the duty cycle orheat output for the top heating element.

As would be understood, following 1040, further additional cycles (e.g.,recharge, standby, or cooking cycles) may be executed or the method 1000may be halted altogether (e.g., in response to expiration of a cookingoperation time limit or corresponding user input).

This written description uses examples to disclose the invention,including the best mode, and also to enable any person skilled in theart to practice the invention, including making and using any devices orsystems and performing any incorporated methods. The patentable scope ofthe invention is defined by the claims, and may include other examplesthat occur to those skilled in the art. Such other examples are intendedto be within the scope of the claims if they include structural elementsthat do not differ from the literal language of the claims, or if theyinclude equivalent structural elements with insubstantial differencesfrom the literal languages of the claims.

What is claimed is:
 1. A method of operating an oven appliancecomprising a plurality of chamber walls mounted within a cabinet anddefining a cooking chamber, a cooking surface defined in the cookingchamber between a bottom wall and a top wall of the plurality of chamberwalls, and a top heating element mounted above the cooking surface toheat the cooking chamber, the method comprising: directing the topheating element according to a preheat cycle comprising a predeterminedpreheat heat output of the top heating element; determining expirationof the preheat cycle; directing, in response determining expiration ofthe preheat cycle, the top heating element according to a standby cyclecomprising a predetermined standby temperature within the cookingchamber; determining expiration of the standby cycle; and directing, inresponse to determining expiration of the standby cycle, the top heatingelement to a predetermined cooking threshold within the cooking chamberaccording to a first cooking cycle comprising a heat output of the topheating element.
 2. The method of claim 1, the method furthercomprising: holding a bottom heating element in an inhibited stateaccording to the first cooking cycle during the high heat output of thetop heating element.
 3. The method of claim 1, the method furthercomprising: detecting an oven temperature greater than or equal to thepredetermined cooking threshold; and directing, in response to detectingthe oven temperature greater than or equal to the predetermined cookingthreshold, the top heating element according to a second cooking cyclecomprising a periodic heat output and a predetermined cookingtemperature within the cooking chamber.
 4. The method of claim 3, themethod further comprising: directing, following the second cookingcycle, the top heating element to an inhibited state according to arecharge cycle; and detecting an oven temperature less than a minimumrecharge threshold while the top heating element is in the inhibitedstate according to the recharge cycle.
 5. The method of claim 4, themethod further comprising: directing a bottom heating element accordingto the recharge cycle, the recharge cycle comprising a high heat outputof the bottom heating element in response to detecting the oventemperature less than the minimum recharge threshold.
 6. The method ofclaim 5, the method further comprising: maintaining the top heatingelement in the inhibited state according to the recharge cycle duringthe high heat output of the bottom heating element.
 7. The method ofclaim 5, wherein the standby cycle is a first standby cycle, wherein themethod further comprises: detecting a bottom temperature greater than orequal to a maximum recharge threshold during the high heat output of thebottom heating element; and directing, in response to detecting thebottom temperature greater than or equal to the maximum rechargethreshold, the bottom heating element to an inhibited state according toa second standby cycle.
 8. The method of claim 7, the method furthercomprising: directing, in response to detecting the bottom temperaturegreater than or equal to the maximum recharge threshold, the top heatingelement according to the second standby cycle.
 9. The method of claim 1,the method further comprising: detecting an oven temperature greaterthan or equal to the predetermined cooking threshold; directing, inresponse to detecting the oven temperature greater than or equal to thepredetermined cooking threshold, the top heating element according to asecond cooking cycle for a set time period, the second cooking cyclecomprising a periodic heat output and a second-cycle predeterminedcooking temperature within the cooking chamber; determining expirationof the set time period; and adjusting heat output at the top heatingelement in response to determining expiration of the set time period.10. The method of claim 9, wherein adjusting heat output at the topheating element comprises: directing, in response to determiningexpiration of the set time period, the top heating element according toa third cooking cycle comprising a third-cycle predetermined cookingtemperature within the cooking chamber, the third-cycle predeterminedcooking temperature being different from the second-cycle predeterminedcooking temperature.
 11. The method of claim 10, wherein the third-cyclepredetermined cooking temperature is less than the second-cyclepredetermined cooking temperature.
 12. The method of claim 9, whereinadjusting heat output at the top heating element comprises: directingthe top heating element to an inhibited state; and directing a bottomheating element to an inhibited state.
 13. A method of operating an ovenappliance comprising a plurality of chamber walls mounted within acabinet and defining a cooking chamber, a cooking surface defined in thecooking chamber between a bottom wall and a top wall of the plurality ofchamber walls, a top heating element mounted above the cooking surface,and a bottom heating element mounted below the cooking surface, themethod comprising: directing the top heating element to a predeterminedcooking threshold within the cooking chamber according to a firstcooking cycle comprising a high heat output of the top heating element;detecting an oven temperature greater than or equal to the predeterminedcooking threshold; directing, in response to detecting the oventemperature greater than or equal to the predetermined cookingthreshold, the top heating element according to a second cooking cyclecomprising a periodic heat output and a predetermined cookingtemperature within the cooking chamber; directing, following the secondcooking cycle, the top heating element to an inhibited state accordingto a recharge cycle; detecting an oven temperature less than a minimumrecharge threshold while the top heating element is in the inhibitedstate according to the recharge cycle; directing a bottom heatingelement according to the recharge cycle, the recharge cycle comprising ahigh heat output of the bottom heating element in response to detectingthe oven temperature less than the minimum recharge threshold; anddirecting the bottom heating element to an inhibited state according toa standby cycle following the recharge cycle.
 14. The method of claim13, the method further comprising: holding the bottom heating element inan inhibited state according to the first cooking cycle during the highheat output of the top heating element.
 15. The method of claim 13, themethod further comprising: detecting a bottom temperature greater thanor equal to a maximum recharge threshold during the high heat output ofthe bottom heating element in the recharge cycle; and directing, inresponse to detecting the bottom temperature greater than or equal tothe maximum recharge threshold, the top heating element according to thestandby cycle, the standby cycle comprising a predetermined standbytemperature within the cooking chamber.
 16. The method of claim 15, themethod further comprising: maintaining the top heating element in theinhibited state according to the recharge cycle during the high heatoutput of the bottom heating element.
 17. The method of claim 15,wherein directing the bottom heating element to the inhibited stateaccording to the standby cycle is in response to detecting the bottomtemperature greater than or equal to the maximum recharge threshold. 18.A method of operating an oven appliance comprising a plurality ofchamber walls mounted within a cabinet and defining a cooking chamber, acooking surface defined in the cooking chamber between a bottom wall anda top wall of the plurality of chamber walls, and a top heating elementmounted above the cooking surface, the method comprising: directing thetop heating element according to a first cooking cycle comprising a highheat output of the top heating element; detecting an oven temperaturegreater than or equal to the predetermined cooking threshold within thecooking chamber; directing, in response to detecting the oventemperature greater than or equal to the predetermined cookingthreshold, the top heating element according to a second cooking cyclefor a set time period, the second cooking cycle comprising a periodicheat output and a second-cycle predetermined cooking temperature withinthe cooking chamber; determining expiration of the set time period; andadjusting heat within the cooking chamber in response to determiningexpiration of the set time period.
 19. The method of claim 18, whereinadjusting heat within the cooking chamber comprises: directing, inresponse to determining expiration of the set time period, the topheating element according to a third cooking cycle comprising athird-cycle predetermined cooking temperature within the cookingchamber, the third-cycle predetermined cooking temperature being lessthan the second-cycle predetermined cooking temperature.
 20. The methodof claim 18, wherein adjusting heat within the cooking chambercomprises: directing the top heating element to an inhibited state; anddirecting a bottom heating element to an inhibited state.